Faithful reproduction of the PICO-8 font as TrueType, OpenType, and glyph. It is monospace except for uppercase L, R, U, D, X, and O which are double-wide icons representing button events.
Double-click the PICO-8.ttf file, then click "Install".
Execute the following command, then click "Install":
gnome-font-viewer <path-to-font-file>